Upgrading the fuel tank

Won't you need a restriction in the return to allow for any pressure to build up?

Or does your regulator handle that.
That's what I'm not sure of. The regulator has (1) inlet and (2) outlets, one of which I currently have the pressure gauge on.
which is why I was thinking that putting a "T" fitting in front of the inlet and running the return off of the "T", but i'm not sure it won't just blow all the fuel back into tank. A carb only needs around 5psi and wether the pump would push enough past the "T" to get 5psi is the question. If not then I will have to change to a return style regulator.